*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

section{
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #042104;
  animation: animateBg 10s linear infinite;
}

@keyframes animateBg {
  0% {
    filter: hue-rotate(0deg);
  }
  100% {
    filter: hue-rotate(360deg);
  }
}

section .loader {
  position: relative;
  width: 120px;
  height: 120px;
}

section .loader span{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* 将各个span旋转18度 */
  transform: rotate(calc(18deg * var(--i)));
}

section .loader span::before{
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #00ff0a;
  box-shadow: 0 0 10px #00ff0a,
              0 0 20px #00ff0a,
              0 0 40px #00ff0a,
              0 0 60px #00ff0a,
              0 0 80px #00ff0a,
              0 0 100px #00ff0a;
  animation: animate 2s linear infinite;
  animation-delay: calc(0.1s * var(--i));
}

@keyframes animate{
  0% {
    transform: scale(1);
  }
  80%, 100%{
    transform: scale(0);
  }
}